SGX Engine Core contains the basic functionality which underpins SGX,
a 3D graphics engine from Steven Goodwin. It is based around a series of
null drivers and loosely-coupled modules to facilitate an infinitely
upgradable engine. It is primarily suited to games and digital TV
backdrops.

Dolphin is a Nintendo GameCube, Wii, and Triforce emulator for Microsoft Windows, Linux, and Mac OS X (on Intel-based machines), it is the first emulator to successfully run commercial GameCube and Wii games, and is still the only emulator capable of running commercial Wii games.

c64-network.org is a networked version of the Frodo emulator, where you can play C64 games against other people over internet. It also has a port to Nintendo Wii and a custom GUI with game information, a virtual keyboard etc.